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Date: Wed, 09 Sep 2009 16:47:34 +0200
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: C++0x : no 'concepts'
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Date: 2009-09-09T16:47:35+02:00
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Dmitry A. Kazakov schrieb:

>> Fantasizing, could we have, in Ada,
>>
>> - recursive instantiations of pure generics?
> 
> Huh, the second edition of interfaces, now for the "Ada preprocessor"? I
> read you that all instances of the same body when instantiated
> automatically will be considered "same". Right?

No, I was thinking of this:


generic
   N : Natural := (if N = 0
                     then 1
                     else new Factorial'(N * Factorial(N - 1)));
function Factorial return Positive;

pragma Pure(Factorial);



(Very much ad hoc.)